1393943936 has 128 divisors (see below), whose sum is σ = 3482818560. Its totient is φ = 539873280.

The previous prime is 1393943933. The next prime is 1393943959. The reversal of 1393943936 is 6393493931.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1393943936² = 3886159393422344192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393943933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2296145 + ... + 2296751.

It is an arithmetic number, because the mean of its divisors is an integer number (27209520).

Almost surely, 2^1393943936 is an apocalyptic number.

1393943936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1393943936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741409280).

1393943936 is an abundant number, since it is smaller than the sum of its proper divisors (2088874624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1393943936 is a wasteful number, since it uses less digits than its factorization.

1393943936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 860 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 50.

The square root of 1393943936 is about 37335.5586003477. The cubic root of 1393943936 is about 1117.0735506128.

It can be divided in two parts, 13939 and 43936, that added together give a palindrome (57875).

The spelling of 1393943936 in words is "one billion, three hundred ninety-three million, nine hundred forty-three thousand, nine hundred thirty-six".